Critically acclaimed director Rama Raju said Niharika will stun the audience with her performance in ‘Oka Manasu’ which is releasing this Friday. On Wednesday the director had a chit-chat with media and shared his thoughts. “I approached Samantha and Regina as I wanted a strong female lead. Though both the actresses were ready to do, the dates are clashing. As per director Madhura Sreedhar’s suggestion, I okayed Niharika. She has delivered the Sandhya I had imagined while writing the script,” said Rama Raju. When asked whether is nervous about the film’s release, he added he made sure that ‘Oka Manasu’ offers good cinematic experience.